From fcf12e5a221621f749841055df1d2c2ada3bf844 Mon Sep 17 00:00:00 2001
From: KangJi <kjhmd9726@gmail.com>
Date: Thu, 27 Feb 2025 21:17:51 +0900
Subject: [PATCH] cmd/cgo: generated headers are incompatible with the latest
 C++ standards in MSVC

The current cgo-generated headers are not compatible with MSVC when using ISO C++ 17 or later.

These headers rely on constructs that are deprecated or removed in newer C++ standards, leading to compilation errors.

This issue affects projects using modern C++ versions and requires either downgrading the C++ standard or manually modifying the generated headers.

Fixes #71921
---
 src/cmd/cgo/out.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/cmd/cgo/out.go b/src/cmd/cgo/out.go
index 43c30a2000..2c3f1e06ff 100644
--- a/src/cmd/cgo/out.go
+++ b/src/cmd/cgo/out.go
@@ -1991,10 +1991,16 @@ typedef size_t GoUintptr;
 typedef float GoFloat32;
 typedef double GoFloat64;
 #ifdef _MSC_VER
+#if !defined(__cplusplus) || _MSVC_LANG <= 201402L
 #include <complex.h>
 typedef _Fcomplex GoComplex64;
 typedef _Dcomplex GoComplex128;
 #else
+#include <complex>
+typedef std::complex<float> GoComplex64;
+typedef std::complex<double> GoComplex128;
+#endif
+#else
 typedef float _Complex GoComplex64;
 typedef double _Complex GoComplex128;
 #endif